Magazini:Kafukufuku wa Avian, 10(1), p.19.
Mitundu (Avian):Atsekwe Aakulu Oyera Akutsogolo (Anser albifrons)
Chidule:
Lingaliro la kusamuka likusonyeza, ndipo maphunziro ena owonetsetsa amasonyeza, kuti pofuna kupikisana ndi malo abwino kwambiri obereketsa ndi kuonjezera kupambana kwa ubereki, othawa kwawo amtundu wautali a mbalame amatengera njira yochepetsera nthawi panthawi yakusamuka kwa masika, zomwe zimapangitsa kuti nthawi yayitali ya masika isamuke poyerekeza ndi nthawi yophukira. Pogwiritsa ntchito ma transmitters a GPS/GSM, tidatsata kusamuka kwathunthu kwa 11 Greater White-fronted Geese (Anser albifrons) pakati pa kum'mwera chakum'mawa kwa China ndi Russian Arctic, kuti tiwulule nthawi yosamukira komanso mayendedwe a anthu aku East Asia, ndikuyerekeza kusiyana kwanthawi yayitali pakati pa kusamuka kwa masika ndi autumn kwa anthuwa. Tidapeza kuti kusamuka mu kasupe (masiku 79 ± 12) kumatenga nthawi yayitali kupitilira kuwirikiza mtunda wofanana ndi nthawi yophukira (masiku 35 ± 7). Kusiyana kwa nthawi yakusamukaku kudatsimikiziridwa makamaka ndi nthawi yochulukirapo yomwe imagwiritsidwa ntchito mu kasupe (masiku 59 ± 16) kuposa m'dzinja (masiku 23 ± 6) m'malo ochulukirapo. Tikukulimbikitsani kuti atsekwewa, omwe amaganiziridwa kuti ndi obereketsa ndalama, adakhala pafupifupi magawo atatu mwa anayi a nthawi yonse yosamukira kumalo oima kasupe kuti akapeze masitolo ogulitsa mphamvu kuti apeze ndalama zobereketsa, ngakhale kuti sitingakane lingaliro lakuti nthawi ya thaw ya kasupe inathandizanso kuti nthawi yopuma iwonongeke. Mu autumn, iwo anapeza zofunika mphamvu masitolo pa kuswana malo okwanira kufika kumpoto chakum'mawa kwa China staging madera pafupifupi popanda kuyimitsa, amene yafupika nthawi kuyima mu autumn ndipo zinachititsa mofulumira yophukira kusamuka kuposa masika.
YOTSATIRA ILI NDI:
https://doi.org/10.1186/s40657-019-0157-6
